I think a lot of people are completely misconstruing the term 'instruct' but you hit the nail on the head. They aren't reading books about that stuff, nor are they instructing by giving lectures. They are instructing by existing, openly. By participating in public life the way they are, like everyone else. The instruction is 'this kind of flamboyant person exists and that's fine'.
There is always the similar 'respectability' argument about pride parades and the presence of the 'kink' people. People marching mostly naked. People marching in gimp outfits. But these people openly marching is what it took to get the level of acceptance of non-cishet existence there is today. Even some of the gay community will be critical of the 'flaming' gays, as if it's holding the movement back.
But people opposed to things like that, and things like drag, on the grounds that it makes the lgbtq community less respectable are fundamentally wrong in that the number of people who say they'd support non-straight people more if not for the flamboyant elements and would actually follow through is vanishingly small. It's even smaller than the people who say that think. There will always, forever, be another excuse, another rationalization, to keep them from supporting public participation by anyone not cisgender and heterosexual. They tell themselves the nice story that it's 'just because they're in you face about it' or 'it isn't appropriate for children', but those excuses shouldn't fool anyone including themselves. They might wish they actually supported non-straight people, cognitively they might known that they should, but they don't.
And as old as ten. This makes you incorrect on two levels.